Add nix configuration

content/config/dir.toml.tmpl

@@ -4,6 +4,7 @@ ignored = [
   {{#if-not-installed podman}}"nushell/completions/podman.nu",{{/if-not-installed}}
   {{#if-not-installed fnm}}"nushell/fnm.nu",{{/if-not-installed}}
   {{#if-not-installed bottom}}"bottom",{{/if-not-installed}}
+  {{#if-not-installed nix}}"nixpkgs",{{/if-not-installed}}
 
   {{#if flags.windows}} 
   # Files irrelevant to windows

content/config/nixpkgs/home.nix

@@ -0,0 +1,4 @@
+{pkgs, ... }: {
+  targets.genericLinux.enable = true;
+  home.packages = [ pkgs.jdk8 ];
+}

content/config/nushell/env.nu.tmpl

@@ -72,3 +72,7 @@ $env.GIT_PAGER = "most"
 $env.LC_ALL = en_GB.UTF-8
 {{/if}}
 $env.HELIX_RUNTIME = {{dirs.config}}/helix/runtime
+
+{{#if-installed nix}}
+$env.NIX_PATH = $"{{dirs.home}}/.nix-defexpr/channels:($env.NIX_PATH)"
+{{/if-installed}}